Reisen said: There's no AIR on the Moon, so I need BOTH sets!
And since there is no air, there isn't anything to vibrate and produce sound, thus implying that her rabbit ears are actually a radio set (if I remember my space facts correctly).
She doesn't need both sets to hear on the moon, she needs both sets to hear back on earth. See, she's used to the vacuum of space, where everything is louder since there's no air to get in the way.
balorn said: She doesn't need both sets to hear on the moon, she needs both sets to hear back on earth. See, she's used to the vacuum of space, where everything is louder since there's no air to get in the way.
That...
I...
There are no words to describe just how wrong that is.
First of all, you NEED air to have sound, because the sound needs a medium to travel through (Remember that phrase, "In space, no one can hear you scream?" This is why). Secondly, less air would make things sound quieter, since the air would be less dense, meaning the sound waves would lose more energy as they travel (if I'm remembering my sound facts right).
There are no words to describe just how wrong that is.
First of all, you NEED air to have sound, because the sound needs a medium to travel through (Remember that phrase, "In space, no one can hear you scream?" This is why). Secondly, less air would make things sound quieter, since the air would be less dense, meaning the sound waves would lose more energy as they travel (if I'm remembering my sound facts right).
You are. The less space there is between the particles that transfer the sound, the further the sound waves can go, since it has to expend less energy to transfer the sound wave to the next particle ahead.
I vaguely remember reading that if you could play an orchestra underwater, you would hear it just as well as if you were hearing it in air.
A vacuum would stop sound from travelling as it would have nothing to vibrate against. Air is what sound normally goes through, and people, for the most part, can hear it fine. Underwater, regular people can't easily make sound because their sound communication is based on exhaling, but sound still travels through water as a medium.
The same goes for solids, as the whole "cans connected with strings" thing shows you. If you ever did that sorta stuff. As long as the sound can resonate well enough against the solid, it'll still transfer the sound, provided it doesn't run out of energy by the time it gets to its intended location.
(you might have to look that stuff up, it's half 2 in the morning and I am not entirely coherent, but that's the best of what I can remember)
Actually, sound waves do travel in space. they have the interplanetary medium to travel through, but the frequency is such that it is inaudible by humans. No sound does not need air but rather any free-floating or gassy substance.